Attain Perfection

Magic flows through not only your body but your mind itself. Reaching beyond what your time allows you to acomplish, you gain the skills of those who have perfected their craft over the  many millenia that predates you. You touch one willing creautre and sellect a proficiency, either with a skill or tool. Until the spell ends, they have Mastery over that proficiency, meaning they tripple their proficiency bonus for any checks involving the chosen skill.

The target must have proficiency with the skill for it to be chosen, however they don't need to have experties in it. If they don't, they will suffer a point of exhaustion per hour spent with Mastery (minimum of 1).